Cut-out block.



R. C. COLE.

CUT-OUT BLOCK.

APPLICATION FILED NOV. 29. 1915.

Patentd Nov. 7, 1916.

, citizen of the;

decreasing the structure,"greatly reduce the cost of manufacture, transportation ROBERT C. COLE, OF

HARTFORD, CONNECTICUT, ASSIGNOR TO THE-JOHNS-PRATT COM- PANY, OF HARTFORD, GONN ECTIGU'I, ACORPORATION OF CONNECTICUT.

cur-our BLOCK.

To all whom it may concern:

Be it known that I, ROBERT C. COLE, a United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented a new and useful Improvement in Cut-Out Blocks, of which the following is a specification.

This invention relates to those blocks which are provided withclips for receiving the terminals of inclosed fuses of the knife blade and ferrule type.

The object of the invention is to, without electrical efliciency of the and installation, by

so designing the parts that they may be made'of strong and durable material which can be cheaplypurchased and easily formedand is light in weight, and that can be shipped disassembled and readily put together to meet the required voltage and circuit conditions by any one at any time with-' out the aid of special tools. This object is attained by stamping the base of sheet metal, which is cheaper, lighter and not as easily broken'as porcelain or slate, and ,mounting the fuse clips upon small insulating blocks, that insure the necessary insulation, and

- which are shaped so that they are merely slipped upon the ends of the metal base of the desired size where" they are retained somewhat loosely but securely the required distance apart by simple means in, such a manner that the clips will aline themselves to the fuse terminals and thus make good electrical contact.

Of the accompanying drawings Figure 1 shows a plan of a single pole base and the two insulating blocks and fuse clips before they are applied to the base. Fig. 2 is a view looking at the underside of the 'base,'*- Fig. 3 shows a side of one of the insulating blocks and the fuse clip mounted thereon- Fig. 4 shows an end view of the block and clip. Fig. 5 shows a plan of the structure with the clips and base assembled. Fig. 6 shows a section on the plane indicated by the dotted line 66 on Fig. 5. Fig. 7 shows a plan of the insulating bloc-k. Fig. 8 shows a .plan'" of three of the structures put together. I Fig.

9shows a section on the plane indicated by the dotted line99 on -Fig. 8.

. The base 1 is stamped to shape of sheet metal, preferably thin steel, withgits edges turned down to stiffen the structure and Specification of Letters Patent.

grooves 6 way, are slightly loose,

'blocks with the fuse clips may be Application filed November 29,1915. Serial No. 63,964.

form the side walls. These bases are of varying lengths depending upon the voltages of the circuits with which they are to be used. In each end of the base is a mortise 2, and desirably from' one-wall of each of these mortises a lug 3 is turned down.

The fuse clips, the fingers of which are bent to the necessary shape to receive the de- Pat'ented Nov. 7, 1916.

sired type of fuse and which are provided with the usual means for securing the ends of the circult wires, are mounted upon small blocks 5 of insulatingmaterial, preferably porcelain. These blocks have longitudinal groove 7 in one side edge. The longitudinal grooves are of-such width and depth that the blocks may be slipped into the mortises in the ends of the sheet metal base, the walls of the base at the side edges of the mortises fitting in the longitudinal grooves in the sides of the blocks and holding the blocks in place. After a block has been slipped into a mortise the lug 3 on the base may, by any kind of a tool, be bent into the vertical groox e 7 in the block (as shown in Fig. 6) so as to keepv the block from slipping endwise out of the mortise in the base. If desired, instead of using a lug for retaining the block, a screw 8 (Fig. 5) may be turned into the base so asto engage the side wall of the block to keep the block from sliding out of the mortise in the base.

the structure were to be used for a 600 v. fuse. The blocks, when assembled in this although they cannot move out of the mortise, so that the clip fingers will aline themselves and make close contact with the terminals of the fuse. Any one at any time can slip the blocks with the fuse clips into the bases and secure them without any special tools. The bases and the blocks with the fuse clips may be made up .in large quantities and shipped separately to desired for use, and the put in as the be assembled as bases for either 250 v. or 600 v. fuses, condltions require.

be arranged for a single The bases may w1re -c1rcu1t or a plurality of clrcuits, and

when assembled. for instance as shown in if.the structure were to be used for a 250 v. fuse than they would be if Fig. 3, the bases may be fastened together by tie bolts 9 and put in place of use,

and the three sets-,of-blocks and clips applied when it is desired to wire up the electrical apparatus. When the bases are secured together in this way barriers of insulating material may be fastened be-' tween the bases, as shown in Fig. 9, and if desired, when the block is used for a single wire, barriers may be placed on each side of the block, as illustrated by the middle section in Fig. .9.

Bases made of sheet metal do not become broken, as do porcelain and slate bases.

The clips being mounted on porcelain blocks a maximum insulation is secured.- As the blocks have a slight movement the clips aline themselves to the fuse terminals. This construct-ion permits] shipping before the fuse clips are assembled, thereby saving space, and as the metal bases are lighter than porcelain, freight is saved. The bases may be arranged for single, two, three or more circuits", and the blocks appliedat any time after the bases have been secured in the place where they ages. Any type of clip maybe. used,.and

any form of attachment for the ends of the circuit wires may be employed.

The invention claimed is: 7 1. A fuse cut-out block consisting of a stampedsheet metal base having openings at its ends, blocks of insulation hav1ng-por-..

tions fitting said openings and retained in operative position by portions of the walls ofsald openings in the metallic base, and

1 fuse terminal clips mounted on the insulating blocks.

are to. be used. I The. blocks are interchangeable for different voltminal clips mounted on the blocks.

"2. A fuse cut-out block consisting of a 40 other by the walls of said slots, and fuse terminal clips mounted on the blocks.

4. A fuse cut-out block consisting of a sheet metal base having mortises extending inward longitudinally at each end, insulating blocks with longitudinal grooves in their the base with the edges of said mortises in the base fitting the grooves in the blocks, and, fuse terminal clips mounted on said blocks.

.5. A fuse out-out block consisting of a sheet metal base with insulating blocks bearing spring clips slidably mounted on the base,

said blocks having portions engaged and resides, said blocks being .slidably mounted on tained by portions of said base, and means for holding the blocks from sliding along the base.

6. A fuse cut-out block having a sheet metal base with mortises near each end and lugs projecting from the base adJacent to the walls of the mortise's, insulating blocks fitting said mortises, said blocks having recesses for receivingsaid lugs, and fuse ter- ROBERT C. COLE. 

